python调用Matplotlib绘制分布点图

import matplotlib.pyplot as plt
from numpy.random import rand
import numpy
import os
import cv2

#setting plt
plt.xlim(xmax=500,xmin=0)
plt.ylim(ymax=500,ymin=0)
plt.xlabel("height")
plt.ylabel("width")


path_1 = r'D:\zhangjichao\view\path_1'


x = []
y = []
files = os.listdir(path_1)
for f in files:
  img = cv2.imread(path_1 + '\\' + f)
  x.append(img.shape[0])
  y.append(img.shape[1])
plt.plot(x,y,'ro',color='red',label='path_1')

path_2 = r'D:\zhangjichao\view\path_2'

x = []
y = []
files = os.listdir(path_2)
for f in files:
  img = cv2.imread(path_2 + '\\' + f)
  x.append(img.shape[0])
  y.append(img.shape[1])
plt.plot(x,y,'ro',color='red',label='path_2')

path_3 = r'D:\zhangjichao\view\path_3'


x = []
y = []
files = os.listdir(path_3)
for f in files:
  img = cv2.imread(path_3 + '\\' + f)
  x.append(img.shape[0])
  y.append(img.shape[1])
plt.plot(x,y,'ro',color='red',label='path_3')

path_4 = r'D:\zhangjichao\view\path_4'

x = []
y = []
files = os.listdir(path_4)
for f in files:
  img = cv2.imread(path_4 + '\\' + f)
  x.append(img.shape[0])
  y.append(img.shape[1])
plt.plot(x,y,'ro',color='red',label='path_4')

yujing = r'D:\zhangjichao\view\xujing'

x = []
y = []
files = os.listdir(yujing)
for f in files:
  img = cv2.imread(yujing + '\\' + f)
  x.append(img.shape[0])
  y.append(img.shape[1])
plt.plot(x,y,'ro',color='green' , label='yujing')

#图例
plt.legend(loc='upper center', shadow=True, fontsize='x-large')
plt.grid(True)

#显示
plt.show()